Internal combustion engine



Sept. 17, 1935. A. ZOLLER INTERNAL COMBUSTION ENGINE Filed Oct. 19, 1952 3 Sheets-Sheet l Sept. 17, 1935. A. ZOLLER 2,014,673

INTERNAL COMBUSTION ENGINE Filed. Oct. 19, 1952 s Sheets-Sheet 2 Sept. 17, 1935. A- ZOLLER 2,014,678

INTERNAL COMBUSTION ENGINE Filed Oct. 19, 1952 5 Sheets-Sheet 5 E55 E55 @m n 07 yatented Seph. 17, 1935 emote INTERNAL COMBUSTIDN ENGKNE Zoller, Berlin, Germany Applicstion October 19, 1932, Serial No. 638.6%

In Ge October 2c, 1931 This invention relates to internal combustion engines and more particularly to such engines which are provided with compressors for over-=- o-wf t. the combustion chambers 02 the engines 5 in which the compressor is adapted to supply the cylinders of the engine with air or with n mixture of gas and air under pressure.

A first object of the invention is to provide an internal combustion engine with one or more re compressors in which s compressor is arranged by the side oi the cylinder or of the cylinders with their axes in parallel relation to cools other in. order to secure o favourable saving of space.

' it further object 02 the invention is to provide it in on. internal combustion engine with several compressors the arrangement of one compressor th its axis perellelto the axis oi the cylinders,

the other compressor-being arranged over the cylinder h with its axis in tronsversal relaso tion to the direction of the cylinder uses, both compressors being adapted either to operate in parallel relation with another, i. e. each com= pressor supplying,' the cylinders of the internal combustion engine with air or with a, mixture oi gas and air under the same presure, or to opera ate in tandem relation with another, i. e. the one compressor and preferably the compressor the ends of which is parallel to the axes of the cylinders first compressing the fluid and then supply- 30 ing the second compressor with said compressed fluid, so that said second compressor may fur ther compress said fluid and deliver it to t w e.

Aim-timer object oi the invention is to provide 3 such an arrangement that the compressor mounted over the cylinders may be driven by means oi? e comp w mounted on the front face oi the with m axis parallel to the cylinder axes.

A further object of the invention is to proi vlde s comprr 0)? as particular type with. s

m w or conchoidal form and a drum rotating the casing and provided with vanes, m which.

a locket surroun the conchoidal cashier with on interval is provided with an inlet for the fluid it to be compressed opposite inlet for the e fluid in the well of the jacket for the casino".

A further object oi the invention is to pro vide an arrangement in which the fluid to be com pressed passes through the lntervei between thev a drum or rotor for such compressors wit rewhen they come to the point where the cruelv connecting pipes, the compressors i:

1 (till. 3123-53) on internal combustion engine with 0- col cylinders. t

A further object of the invention isto provide compressors for the aforementioned purpose with continuous vanes having outer shoes at their ends 5 A further object oi the invention is to provide cesses into which the verse shoes may 1';

lies nearest the conchoidai Other objects and advantages oi the i tion will become eppsrent'iro detailed description of o, prelim. ed emiof the invention taken in conjiuictiom v. accompanying drawings. is, however, to l derstood-that still msnyj other forms oi exec tion are possible which wiiihe ewe-rent to one quainted with the set and that use-n5. on-

1 may be made without departing from scope or the invention as set forth. in the appended claims.

In the drawings: Figure l shows'an internal combustion engine with compressors according to the invention, in on elevational and part in e, sectional view. Figure 2 is a. sectional view taken or; (l-d of Figure la in the direction oi the arrow. Figure 3 shows one of the compressors an enlarged scelepert in. en elevetionei port in a longitudinal sectioned 3% Figure 4 is an enlarged sectioned view their. 1 c compressor taken on line -ii views: 1 direction of the arrow, e portion or the e casing being also sitcom-1..

Figure 5 is o w m ticsl vies? showing how 35 the fluid is guided in the compressors and in the trlbutor being shown in a. sectlonsi vi I Figures 6a and it are elevations! views; of ovaries of e. cpresmr. A to "Figure l is a side view oi the vane oi Figure "Figured is a side view of s. vane sheep Figure 9 is a sectional. view of the vane fillfifil Referring now to Figures 1 and 2 oi? the disco lugs, id is the internal combustion engine the cranls case and it the crsni; trough. Tue shaft li'carries the cross ii to which con nected the" main connecting: rod it end the sun-"li iary connecting rod It fertile pistons it and re spectively; The pistons reciprocate in. s manner in the cylinder it which is t c-shaped the two legs 20 and 2 i Both cylinder legs it end it are provided'wlth the cylinder cover the whole forming the common combustion chamber 55 23. In the embodiment shown, it is supposed that the engine is a six cylinder one, but only one cylinder is shown in a sectional view. Of course, however, the invention is not limited to such an engine and relates to single cylinder engines as well as to multi-cylinder engines. In the same manner, the invention may be applied to the usual engines with only one piston in each cylinder in lieu of two pistons in each cylinder, as shown.

The compressor 24 is parallel to the axis of the cylinder l9 so that the Jacket 26 for the cylinder cooling chamber 26 also forms a jacket surrounding the casing 21 of the compressor 24. The casing 21 has a conchoidal form, as shown in a sectional view in Figure 4 in relation with the circular form 26. In the casing, excentrically mounted with respect to its axis, is the rotor drum 29. The vanes, vane shoes and arrangements for guiding the vanes pertaining to said rotor drum are shown more particularly in the Figures 3 and 4, in order to make the Figures 1 and 2 clearer.

The space surrounded by the casing 21 is closed on both front sides in the lower part by the cover 33 and in the upper part by the cover 3|. In said covers are mounted the antifriction bearings 32 and 33 respectively for the stub shafts 34 and 46 of the compressor drum or rotor. At the lower end of the stub shaft 34 is secured a bevel gear 35 engaging another bevel gear 36 secured to the crank shaft. Therefore, when the crank shaft l3 rotates, the rotor 29 of the compressor 24 is also rotated through the bevel gears 36, 35.

- Mounted over the cylinders of the internal combustion engine is the second compressor 31,

- the axis of which is in transversal relation to the cylinder axes. The casing 33 and the rotor 39 of said compressor are formed in the same manner as for the compressor 24. The casing 36 is also surrounded with an interval by a jacket 40 forming a part of the cylinder head 22 together with the casing wall. The compressor casing 33 is closed on both sides by front plates 4| carrying antifriction bearings 42 for the axis 43 of the rotor. Onto the axis 43 is secured a bevel gear 44 engaging with the bevel gear 45 supported by bearing 41 at the upper end 46 of the shaft of the rotor 29.

It will be apparent that there is so provided an engine the compressors of which have a form which absolutely suits the form of the internal combustion engine and require a minimum of space. Such an arrangement has the particular advantage that the casing of the compressor 24 may be machined simultaneously with the cylinders of the internal combustion engine, because its axis is parallel to the axes of said cylinders.

' Accordingly, while the arrangement of a compressor alone on the cylinder heads does not form the object of the invention, the arrangement of a compressor the axis of which is parallel to the cylinders of the internal combustion engine is an essential feature of the invention, as well in the case that such a compressor is used alone as when said compressor is used together with a compressor mquntedon the cylinder heads.

The cylinders of the internal combustion engine are further provided with an outlet passage 41 and an inlet passage 43 and with an igniting device 49 of known form mounted in the cover 22 and only diagrammatically indicated. Connected to the inlet 43 is the pipe 5| coming from the carburetter 63.

Each compressor is provided with an inlet 62 through which the air may enter the space between the casing walls 21 and 33 respectively and the jackets 26 and 43 respectively. Provided in the wall of the casing 21 are one or more openings 53 through which the air may'ente'r the easing coming from the space between the Jacket 26 and the wall 21. substantially opposite the inlet 62, so that the entering air first flows over the casing wall 21 on the outer side of the same. Simultaneously the result of this is that the induction noises of the compressor are damped. Each compressor is 10 provided with one or more o'utle't connecting branches 54 to which are connected the pipes 66 leading to the carburetter or to the carburetters.

I Each compressor rotor has a pair of continuous vanes 56 and 51 which are shown apart in Figures 15 6a and 6b. Rotors with such vanes are already known, but the vanes according to the invention carry shoes 53 at. their outer edges near the front walls of the compressor casing'and the drum 23 has recesses 59 in which the shoes may be received 20 when they reach their lower position during rotation of the drum in the direction of the arrowin Figure 4. The form of the vane shoes 63 is shown in Figures 8 and 9. Said shoes have a notch 60 into which the offset edge 6| of the vane 25 66 or 51, as the case may be, may project, so that the shoe 66 may reciprocate with respect to the vane 56 or 51. The rest of the arrangement of the rotor and particularly its connection with the stub shafts 34 and 46 forms no part of the inven- 30; tion.

The other arrangement of the compressors with respect to the internal combustion engine, as. shown in Figure 5, is made for the purpose ,of' rendering it possible to connect the compressors 35; so that they work inparallel or in tandem relation, at will.

To this end, there are provided two compressors 62 and 63 which, in all essential parts, are similar to the above described compressors. The com- 40 pressors 62 and 63 are provided with inlet connecting branches 64 and 66- and with outlet connecting branches 66 and 61 respectively. The internal combustion engine is provided with a carburettor 66, but, of course, there may be also a 46 plurality of carburetters. The pipe 5| leads in a known manner from the carburettor to the inlet passages of the internal combustion engine. A- control device 63 is provided which, in the example shown, comprises a multi-way valve shown i-v in a sectional view. The casing 69 of said valve has the openings Ill, ll, 12 and 13. A valve plug 14 of suitable form is rotatively mountedin the valve box so that it may, in one of its positions, H bring the openings 1| and 12 to register while cutting off the openings 19 and 13 from the others.

In the second position, which is shown in dotted lines, the valve plug may bring the openings 13, II on the one hand and the openings 12 and 13, on the other hand, to register.

The closing device 63 is connected to the compressors 62, 63 and with the carburetters 63 so that the inlet connecting branch 64 of the compressor 62 is connected with the opening II through a pipe 16. The outlet connecting branch Y 66 of the compressor 62 is connected with the carburetter 66 through a pipe 16. Connected with said pipe is a branch 11 which leads to the opening 13 of the shutting oil device 63.

The outlet connecting branch 61 of the com- 7 pressor 63 is connected with the opening 12 through the pipe 13. The opening 13 of the control device 63 and the inlet 66 of the compressor 63 lead into the atmosphere.

, The operation of the device is as follows: 76

The openings 63 are provided 5 then to the opening 12 and through II and I5 to the inlet 64 of the compressor 62. In said compressor 62 the air compressed in the compressor 63 first flows over. the casing wall and then enters the compressor casing where it is further compressed, after which it is led to the carburettor 50 through the outlet 66 and. the pipe it. No air flow takes place through the pipe "ll,

because the openings 10 and T3 are cut off by the valve plug it.

when the valve plug It is in the position shown in chain lines, air enters. the compressor 63 through the inlet and is then led to the carburetter through outlet 6i, pipe 18, openings It and it and pipe ll. At the same time air enters the casing of the control device 68 through open ing lit, then the compressor 62 through opening ll, pipe 15 and inlet The air compressed in the compressor 62 is also delivered to the carburettor 5t through outlet lit and pipe l6.

Of course, many changes may be made without departing from'the scope of the invention. For instance, instead of a single compressor the axis of which is parallel to the cylinder axes, two or more such compressors may be used, which may be mounted at both ends of the engine. Furthermore, other compressors may also be mounted at the side of the engine or at any other suitable place instead oi being mounted on the cylinder heads; it is only essential that onecompressor at least be -mounted with its parallel to the axes oi the cylinders. It is further not necessary that an internal combustion engine with U-shaped cylinders is used; on the contrary, an engine with the usual ordinary cylinders and ordinary pistons may also be used, but an engine with U-shaped cylinders is shown in the drawings, because the particular form and type of the compressors shown ensure particular advantages with an engine of this type. Furthermore, it is for instance not necessary that the connecting pipes between the compressors and the internal combustion engine are arranged in the manner shown and it might be possible to provide the connecting passages in the interior of the engine casing. The invention is, therefore, limited only by the text of the appended claims.

claim:

i. in an internal combustion engine with a preliminary compressor, the arrangement of the compressor on the front side of the engine with its axis parallel to the axes of the engine cylin-= ders, a second compressor mounted on the top of the engine, and means for driving the second compressor through the first compressor.

2. In an internal combustion engine with a preliminary compressor, the arrangement oi the compressor on the front side oi the engine with its axis parallel to the axes of the engine cylinders, and a second compressor on the engine cylinder heads with its axis in transversal rela tion to the axes of the cylinders.

3. In an internal combustion engine with a preliminary compressor, the arrangement oi the compressor on the front side of the engine with its axis parallel to the axes of the engine cylln= ders, the compressor casing being surrounded by a jacket and said jacket being made of one :5

piece with the jacket of the adjacent cylinder, a second compressor mounted on the engine at right angles to the first compressor, and means drivably connecting the first compressor to the second compressor. re 4. In an internal combustion engine with a preliminary compressor, the arrangement'of the compressor on the front side of the engine with its axis parallel to the axes of the engine cylln= ders, and a second compressor on the ermine l5 cylinder heads with its axis in transversal rele tion to the axes of the cylinders, the casing of said second compressor being surrounded lay a jacket integral with the cylinder heads of the engine cylinders.

5. In an internal combustion. engine with a preliminary compressor, the arrangement of the compressor on the front side of the engine with its axis parallel to the axes of the engine cylinders, and a second compressor on the engine 25 cylinder heads with its axis in transversal tion to the axes of the cylinders, and means for driving the rotor of the first compressor from the crank shaft, and means for the so and compressor from the first compressor.

in an internal. comhustion engine preliminary compressor, thev arrangement of the compressor on the front of the engine its axis parallel to the axes oi the engine tiers, and a second'ccmpresscr on the engine till cylinder heads with its aids in tmnsvereal relation to the axes of the cylinders, both compressors being connected with the same carhuretters oi the internal combustion engine through pipm connected with the outlets for the compressed fluid. v

r. In an internal combustion engine witl'i a preliminary cressor, the arrangement of the compressor on the front side of the engine with its axis parallel to the axes of the curse cyllntiers, and a second compressor on the w e cplinder h with its axis in transversal relation tion to the axes of the cylinders, and pipes he tween the compressors and one or more earhu retters or the internal combustion engine and a shifting member for connecting thepipes, which member is provided, in one of its positions, wide.

a pc with which the outletoi'the first com presses and the inlet oi the second compressor are connected and, in a second with a passage with which the outlet at the second compressorand the carburettor are connected, and a second pae in communipation with the atmosphere and with which the inlet of the second to compressor is connected, the outlet or the second compressor being connected with the carlcuretter.

9. m combination with internal combustion engine having an intake i e, a pair or compressors therefor, each having an intake conduit in and an outlet conduit, and a manually operable valve for selectively connecting the outlet conduit of one compressor to the inlet conduit or the second compressor or to the intake passage of the engine, said second compressor having its outlet conduit connected to the engine intake passage at all times.

10. In combination with an internal combustion engine, a-pair of, compressors for supercharging the engine, and a valv including a valve casing having a plurality of openings and a rotatable partition therein controlling the openings and arranged to connect the superchargers in series or in parallel at the will of the operator.

11. In combination with an internal combustion engine, a pair of compressors for supercharging the engine, and a single valve including a casing having a plurality of openingsand a rotatable partition therein operable upon a 'ninety degree movement arranged to provide communication between two adjacent openings and to connect the superchargers in series or in parallel at the will of the operator.

12. In combination with an internal combus tion engine having an intake passage, a: pair of compressors for supercharging the engine having 5 intake and outlet conduits, the intake of one compressor being in communication with the atmosphere and the outlet of the second compressor being in communication with the engine intake passage, a casing having four openings 10 distributed about its periphery, two adjacent openings being connected respectively to the outlet oi the first compressor and the inlet of the second compressor, the remaining two openings being connected respectively to the engine intake 15 passage and the atmosphere, a rotatable -partition in the casing adapted to provide communication between any two adjacent openings on the same side of the partition and adapted to se lectively connect the superchargers to the engine 20 in parallel or in series.

ARNOLD ZOLL ER. 

